A Look Inside A Tesla Battery Cell Shows Superiority Over Standard 18650 – Video

APR 2 2017 BY MARK KANE 15

ARIES RC channel, that is promoting new technology (specifically new battery technology) in unmanned UAVs, released an interesting video on Tesla’s lithium-ion battery (of which they sell on ebay).

What’s inside a Tesla Battery? (source: ARIES RC)

The cell (18650 type) was discharged and disassembled to check out what’s inside.

Of interest is that while Panasonic of course sells a lot of 18650 cells publicly, the cell originally made with Tesla, is a custom job.

From the seller’s listing, it is demonstrated that the Tesla/Panasonic cell retains 95% of its capacity after 500 full cycles, while the traditional Panasonic 18650 has about 75% over the same duty-life (see graphic below).

So as it turns out, batteries from Tesla cars will likely get a lot of future-life applications once they will be removed from cars – UAVs will be one of many.

Tesla battery sell (ebay/Tesla_Batteries) offered this performance spec/lifespan chart on his listing

Tesla and Panasonic are now currently producing larger/more dense 2170 cells at the automakers Gigafactory plant in Nevada;  those cells currently supply new PowerPack and Powerwall energy storage solutions, and will also be found in the Tesla Model 3 when it enters production in July.

via Electrek

Categories: Battery Tech, Tesla, Videos


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15 Comments on "A Look Inside A Tesla Battery Cell Shows Superiority Over Standard 18650 – Video"

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You know.. It is apparent that it requires a decent amount of pressure on these parts to make them work since there is no liquid electrolyte. The circular housing provides that. But in the case of flat cells, they usually have to have a lot of extra heavy hardware to apply pressure on groups of cells. Makes me wonder which approach is better. The Tesla cells do seem less space-efficient, though.

I think manufacturing cost efficiency was the main reason Tesla cited with sticking with the form factor. Ability to run liquid cooling easily through was another side benefit.

“Typical lithium ion batteries such as the one Tesla uses contain a flammable liquid electrolyte…”

Thank you!

So far as I know, all li-ion batteries being mass produced today use liquid electrolyte.

There is an exciting new tech that was demonstrated in a recent episode of PBS’s “Nova”; an episode entitled “Search for the Super-Battery”, which showed a lab demo of a plastic battery, a “solid state” li-ion battery with no liquid electrolyte. The demo showed it could be punctured or cut without short-circuiting or overheating, and the plastic is even flame-retardant!

Here’s hoping they can get that tech into affordable mass production soon.



Thanks for the reminder of that episode. It is a great watch for anybody who hasn’t seen it yet.

A lot of labs are racing to develop solid state batteries. Goodenough’s lab or this one (Ionic Materials) are my favorites to actually do it. We shall see, though.

Sakti3 bought by Dyson has it. Good battery which may not be cost effective right now.

***mod edit (staff)***

To answer your question, noper. Edit, part of an EVANNEX story as an add on at the bottom, (=

***mode edit***

He’s still an idiot. That black, crumbly stuff he discards near the beginning and never talks about again is the anode. The copper sheet is, I think, neither electrode but rather a current collector.

Also, he should wear gloves when handling unknown (to him, at least) chemicals.

You have to give him props for trying his best. Seems to be young, and this might be one of his first times experimenting with these batteries.

I thought April Fool’s was yesterday.

Oh, Panasonic’s 18650 batteries are so 2012! 😉

We want to know more about the Gigafactory’s 2170 battery cells.

Ooh, thanks! I see my comment is there. The only possible place I could have commented on this before was Slashdot (or its clone). I was questioning my own memory until you found this.

No one is going to put a used battery in a new UAV. In a UAV the reduced runtime due to increased internal resistance (DC-IR in the graph above) will be more punishing than the decreased in rated capacity.

What a weird article.